本文采用藤井贤治三梯形法得到的轮齿综合变形来计算直齿轮轮齿的综合啮合刚度和单齿啮合刚度，并考虑弹流润滑的中心油膜厚度产生的影响，得到了一种更完善更接近工程实际的直齿轮传动中各啮合点的齿间载荷分布关系并用这种新的齿间载荷分布关系计算得到标准和变位直齿轮在各啮合点处的中心油膜厚度分布关系，两者与传统值有较大差异这将有助于人们对齿轮传动的强度、润滑和失效机理更深入的认识． In this paper, Fujii Kenji three trapezoidal three gear trapezoidal deformation obtained to calculate the spur gear meshing meshing stiffness and single tooth meshing stiffness, and taking into account the impact of the central oil film thickness of the eolian lubrication has been a more perfect Close to the engineering practice of the spur gear transmission at each meshing point of the interdependencies between the load distribution and the use of this new relationship between the load distribution of the gear and variable spur gears at each meshing point of the central oil film thickness distribution, There is a big difference between the traditional values ​​This will help people understand the strength, lubrication and failure mechanism of gear transmission more deeply.